CentOS7 下 keepalived 的安装和配置

cd /usr/local/src
wget http://www.keepalived.org/software/keepalived-1.4.0.tar.gz
#解压文件
tar -zxvf keepalived-1.40.0.tar.gz
#编译
cd keepalived-1.40.0/
#--prefix 指定安装地址
#/usr/local/keepalived/ 安装的目录，不要和自己安装文件一个目录，不然报错
./configure --prefix=/usr/local/keepalived/
#编译并安装
make && make install

vim /usr/local/keepalived/etc/keepalived/keepalived.conf
global_defs {
notification_email {
#mr@mruse.cn # 指定keepalived在发生切换时需要发送email到的对象，一行一个
#sysadmin@firewall.loc
}
notification_email_from xxx@163.com # 指定发件人
smtp_server smtp@163.com # smtp 服务器地址
smtp_connect_timeout 30 # smtp 服务器连接超时时间
router_id LVS_1 # 标识本节点的字符串,通常为hostname,但不一定非得是hostname,故障发生时,邮件通知会用到
}vrrp_instance VI_1 { # 实例名称
state MASTER # 可以是MASTER或BACKUP，不过当其他节点keepalived启动时会将priority比较大的节点选举为MASTER
interface eth0 # 节点固有IP（非VIP）的网卡，用来发VRRP包做心跳检测
mcast_src_ip 192.168.0.179 #本机的ip，需要修改
virtual_router_id 51 # 虚拟路由ID,取值在0-255之间,用来区分多个instance的VRRP组播,同一网段内ID不能重复;主备必须为一样;
priority 100 # 用来选举master的,要成为master那么这个选项的值最好高于其他机器50个点,该项取值范围是1-255(在此范围之外会被识别成默认值100)
advert_int 1 # 检查间隔默认为1秒,即1秒进行一次master选举(可以认为是健康查检时间间隔)
authentication { # 认证区域,认证类型有PASS和HA（IPSEC）,推荐使用PASS(密码只识别前8位)
auth_type PASS # 默认是PASS认证
auth_pass MrUse # PASS认证密码
}
virtual_ipaddress {
192.168.0.219 # 虚拟VIP地址,允许多个
}
}

#拷贝配置文件到/etc/keepalived目录下
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ #复制keepalived脚本到/etc/init.d/ 目录
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ #(可忽略)
#拷贝keepalived脚本到/etc/sysconfig/ 目录
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ #建立软连接
ln -s /usr/local/keepalived/sbin/keepalived /sbin/ #添加到开机启动
chkconfig keepalived on
#查看服务状况
systemctl status keepalived